Finding the Fourth Proportional to 51,066.62, 70,443.16 and 30,643.40

Step by Step Solution

1. Step 1: Write the proportion equation
   51,066.62 : 70,443.16 = 30,643.40 : x
2. Step 2: Convert to fraction form
   51,066.62/70,443.16 = 30,643.40/x
3. Step 3: Cross multiply
   51,066.62x = 70,443.16 × 30,643.40
4. Step 4: Simplify right side
   51,066.62x = 2,158,617,886.49
5. Step 5: Solve for x
   x = 2,158,617,886.49/51,066.62
6. Step 6: Final answer
   x = 42,270.62